Shower drain



FIG. 1 is a top plan view of the shower drain, showing my new design;

FIG. 2 is an end view thereof;

FIG. 3 is an exploded view thereof;

FIG. 4 is an exploded, perspective view thereof; and,

FIG. 5 is a perspective view thereof shown in an environmental position of use.

The broken lines illustrate portions of the shower drain and environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a shower drain, as shown and described. 